Ancient Blue Dragon
D&D 5.5e · gargantuan dragon, lawful evil
Defense
Proficiencies & Senses
Traits
Traits
Legendary Resistance
If the monster fails a saving throw, it can choose to succeed instead.
Actions
Multiattack
The monster makes three Rend attacks. It can replace one attack with a use of Spellcasting to cast Shatter (level 3 version).
Rend
Melee Weapon Attack: +16 to hit, reach 15 ft., one target. Hit: 2d10+9 slashing damage plus 2d8 lightning damage.
Lightning Breath
Dexterity Saving Throw: DC 23, each creature in a 120-foot-long, 10-foot-wide Line. Failure: 16d10 lightning damage. Success: Half damage.
Spellcasting
The monster casts one of the following spells, requiring no Material components and using Charisma as the spellcasting ability (spell save DC 22): At Will: Detect Magic, Invisibility, Mage Hand, Shatter (level 3 version). 1/Day Each: Scrying, Sending.
Reference Text
Ancient blue dragons are lawful evil dragons that dwell in coastal and desert regions. They are cunning and territorial, using their lightning breath and spellcasting to dominate their domains.